It is very time that you ____ over a new leaf.
题目
It is very time that you ____ over a new leaf.
A. would turn B. turned C. have turned D. turn
选B吗? 理由是?
答案
选b吧,虚拟语气(直觉这样选)
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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